public class Test {
    public static void main(String[] args) {
        BinaryTree binaryTree = new BinaryTree();
        BinaryTree.TreeNode root = binaryTree.createTree();
        binaryTree.preOrder(root);
        System.out.println("==========");
        binaryTree.inOrder(root);
        System.out.println("===========");
        binaryTree.size2(root);
        System.out.println(BinaryTree.usedSize);
        System.out.println("============");
        binaryTree.levelOrder1(root);
        System.out.println("============");
        System.out.println(binaryTree.isCompleteTree(root));

    }
}
